The Blaser might be VSR10 based but haven't heard much about it since it's new.
As for the OP, definitely the CA M24; the rest are crap clones. If it's not CA M24, TM VSR10/L96, or Maruzen APS-2 it's not worth it as a starting base platform. The only nod I'll give to clone companies is the JG BAR-10 which isn't that bad but between a BAR-10 and a VSR-10 as a base platform I'd take the VSR unless you're on an extreme budget (and in which case, how are you going to afford upgrade parts like a V Trigger/Zero Trigger which run $100 right then and there for that one part).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE